A teen pop star, a rock band and a rapper will help the no-doubt-already-hot crowd get even more heated at this year's MTV Video Music Awards pre-show.

Ashlee Simpson, New Found Glory and Jadakiss with Anthony Hamilton have been announced as the performers for the "2004 MTV Video Music Awards Pre-Show by the Shore," which will air live from the red carpet in Miami on Sunday, August 29 from 6:30 - 8 p.m.

Sauntering to the podium to present on the big night is a bevy of celebrities including songstresses Brandy, Shakira, Evanescence's Amy Lee, Queen Latifah, Jennifer Lopez, Hilary Duff and Ashlee Simpson. Representing for the men of hip-hop are Mase, Omarion, LL Cool J, P. Diddy, Ludacris and Will Smith, while sportsmen Shaquille O'Neal and Tony Hawk will help quicken a few heartbeats. Rounding out the star-studded list of presenters are Nick Lachey, Beastie Boys, John Mellencamp, Gwyneth Paltrow, Jimmy Fallon, Paris Hilton, Lenny Kravitz and Jon Stewart.

As for the nominees, Jay-Z is the leader of the pack this year with six nods for his "99 Problems" clip. Nipping at his smartly attired heels are Beyoncé, No Doubt, Usher and Outkast with four nominations each.

The most anticipated and most coveted award of the night, the Viewer's Choice Award, is being determined this year by the VMAyhem Viewer's Choice Playoffs, which allowed MTV.com users to narrow a list of 40 videos down to five nominees through head-to-head video battles. Voting for the five nominees — Christina Aguilera's "The Voice Within," Good Charlotte's "Hold On," Linkin Park's "Breaking the Habit," Simple Plan's "Perfect" and Yellowcard's "Ocean Avenue" — is under way.

Catch all the sizzlin', star-packed VMA action direct from Miami on August 28. MTV News' preshow kicks things off at 6:00 p.m. ET/PT, followed by the big show at 8 p.m.